But GM(GM) is required to turn over additional information on the recall to the National Highway Traffic Administration by April 3,including details of every accident, injury or fatality that's been tied to the faulty ignition switch.

That information will be made public, with some facts redacted, including corporate secrets and personal information about some of the crash victims.

Safety experts say it is very likely that many of the family members of people killed by the faulty ignition switch are not yet aware of the true cause of the accidents. Police investigating the accidents were probably looking at other causes of the accident, such as road conditions or driver errors, rather than whether the key was switched to the wrong position after the accident.

The new information could also boost the number of fatalities tied to ignition problem.

Some family members of people who died in the recalled vehicles have recently come forward after seeing news reports about the recall. If GM wasn't already counting these fatalities, it's quite possible that the list of deaths related to the ignition switch flaw will grow.